Default Timing Configuration
Use the Default Timing section of the General tab to change the default settings for the Write Inactivity Period, the file/group sync timeout, and the group inactivity timeout. The agent uses these values for all open files on the selected server that belongs to the agent. If you specify non-default values for any of the files in the File/Group tab, those files do not use these settings.
The following options are available in the Default Timing section of the General tab:
The number of consecutive seconds that an open file must be inactive before the agent considers the file safe for backup. In the case of a group, the agent applies the Write Inactivity Period to every file in the group simultaneously before synchronizing the files in the group. The agent will continue to try to find a Write Inactivity Period of the indicated duration for each file or group until the File or Group Sync Timeout is exceeded. The default value is applied to all files unless modified by a specific entry in the File/Group tab of the Configuration dialog.
The period, specified in seconds, that the agent waits to determine if it is safe to create the NSS snapshot volume from which a backup client can access the files. The agent continues to try to establish an inactivity period of the required duration until the NSS Sync Timeout is exceeded.
The number of consecutive seconds that the agent continues attempting to determine if a file, or group of files, is inactive (as defined by the Write Inactivity Period). If the timeout expires before it finds a safe time, the agent rejects the open request from the backup client.
The period, specified in seconds, that the agent waits before it stops trying to find a safe time to create the NSS snapshot volume. If the timeout expires without finding a safe time, the agent does not create the NSS snapshot volume. In this case, the backup client can either fail the backup, or it can access the files from the original volume but without access to any open files.
The period the agent waits to determine when to close an open group if the backup client has not processed all of the files in the group, but none of the files is currently open.
If this activity times out, it is noted in the log, the group is closed automatically, and the preview data is discarded. You should set this parameter to at least the time normally taken for the client to perform a complete backup run. The default value is applied to all new groups you add using the File/Group tab of the Configuration dialog.
For example, if there are five files in a group and you set the Group Inactivity Timeout to two hours, a timeout occurs if the backup client takes more than two hours between finishing the backup of file 4 and opening file 5. This can happen for a number of reasons, such as those listed below:
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